22279491 has 24 divisors (see below), whose sum is σ = 34994960. Its totient is φ = 13576896.

The previous prime is 22279463. The next prime is 22279531. The reversal of 22279491 is 19497222.

It is a de Polignac number, because none of the positive numbers 2^k-22279491 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22274491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11880 + ... + 13626.

Almost surely, 2^22279491 is an apocalyptic number.

22279491 is a deficient number, since it is larger than the sum of its proper divisors (12715469).

22279491 is a wasteful number, since it uses less digits than its factorization.

22279491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875 (or 1872 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 22279491 is about 4720.1155706190. The cubic root of 22279491 is about 281.3855263869.

The spelling of 22279491 in words is "twenty-two million, two hundred seventy-nine thousand, four hundred ninety-one".